Lifting device



(No Model.)

M, CAHILL.

LIFTING DEVICE. No. 245,054. Patented Aug. 2,1881.

PATENT OFFICE.

MORTIMER GAHILL, OF J AOKSONVILLE, ILLINOIS.

LIFTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 245,054, dated August 2, 1881. Application filed February 16, 1881. (No model.) i

To all whom it may concern Belt known that I, MORTIMER GAHILL, a citizen of theUnited States, residing at Jacksonville, in the county of Morgan and State of Illin0is,have invented certain new and useful lmprovements in Lifting Devices; and I do hereby declare that the following is a full, clear, and exact description of the same, reference beingv had to making a part of this specification, and to the letters and figures of refer ence marked thereon.

This invention has relation to certain new and useful'improvements in lifting devices, it beingfound important, inmany places, to have a lever or lifting device which would combine great power, simplicity, and ease of manage ment, together with a self-locking principle,

' when the object to be raised is either raised to its greatest height or lowered to its restingpoint.

It is the object of my invention to provide a device that will successfully embody the above-mentioned features, which I attain by the construction and combination of the several elements illustrated in the accompanying drawing and hereinafter described.

In the drawing, which represents a side elevation of my invention, A is a suitable base, or any frame to which thelifting device may be connected where it is desirable to lift an object easily.

B is an ordinary bar, of metal or other suitable material, which Serves as a lever, and is formed with an elongated slot, at.

The lever B is pivoted to a suitable short standard, I), and one end of an angle-iron, O, is connected to thelever by means of a rivet or bolt, 0, which passes through the elongated the annexed drawing,

slot at, so that the angle-iron will have the required movementalong the slot when the lever is being operated. This angle-iron C, at or near its center,is pivoted to the short standard b, and one end of the angle-iron is pivoted to a link or brace, D, the latter being in turn pivoted to the end of an arm, E, said arm being pivoted to the base A or any other suitable object. By this arrangement of pivoted connections it will be readily seen that as the lever B is brought aronndto the position shown in broken lines the object connected at x to be be raised or lowered will pass the distance described by Figs. 1 and 2, the downward force of which at either point will lock the lever B or hold it in position.

Inplace of the elongated slot at, a suitable clasp may be attached to the upper end of angle-iron O, the lever B passing through said clasp. This construction will effect the same result and allow the required movement of the lever and angle-iron.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A lifting device consisting of the lever B, an gle-iron 0, link or brace D, and arm E, all constructed and arranged in combination with each other substantially as and for the purpose set' forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

MORTIMER CAHILL.

Witnesses:

N. B. GERALD, E. BARINGTON. 

